package main

import "fmt"

func main() {
	user01 := []string{"00", "01"}
	user02 := []string{"10", "11", "12"}
	user03 := []string{"20", "21", "22", "23"}

	fmt.Printf("%q,%q,%q\n", user01, user02, user03)
	copy(user01, user02)
	fmt.Printf("%q,%q,%q\n", user01, user02, user03)
	copy(user03, user02)
	fmt.Printf("%q,%q,%q\n", user01, user02, user03)

}
